<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        /*.box1{
            width:200px;
            height:200px;
            background-color:#bbffaa;
            border:10px orange solid;
            padding:10px 20px 30px 40px;
            margin-top:100px;
            margin-left:100px;
            margin-right:100px;
            margin-bottom:100px;

        }
        .inner{
            width:100%;
            height:100%;
            background-color: aqua;
        }
        .box2{
            width:200px;
            height:200px;
            background-color:#bbffaa;
            border:10px orange solid;
            margin-bottom:100px;
        }
        .outer{
            width:800px;
            height:200px;
            border:10px red solid;
        }
        .inner{
            width:auto;
            height:200px;
            background-color: #bfa;
            margin-left:auto;
            margin-right:auto;
        }
        .outer{
            background-color: aqua;
            height:300px;
        }
        .inner{
            width:100px;
            height:200px;
            background-color: yellow;
            margin-bottom: 100px;
        }
        .box1{
            width:200px;
            height:200px;
            background-color: aquamarine;
            overflow: auto;
        }
        .box2{
            width:100px;
            height:400px;
            background-color: coral;
        }
        .box1,.box2{
            width:200px;
            height:200px;
        }
        .box1{
            background-color: aqua;
            margin-bottom:-100px;
        }
        .box2{
            background-color: chartreuse;
            margin-top:100px;
        }x
        .box3{
            padding-top:100px;
            width:200px;
            height:200px;
            background-color:chartreuse; 
        }
        .box4{
            width:100px;
            height:100px;
            background-color:aqua; 
            margin-top:100px;
        }*/
        .s1{
            background-color: chartreuse;
            padding:100px;
            border:50px;
            margin:20px;
        }
        .box1{
            width:200px;
            height:200px;
            background-color:aqua;
        }
        

    </style>
</head>
<body>
    <span class="s1">我是span</span>
    <div class="box1"></div>
    <!--<div class="box1">
        <div class="inner"></div>
    </div>
    <div class="box2"></div>
    <div class="outer">
        <div class="inner"></div>
    </div>
    <div class="outer">
        <div class="inner"></div>
    </div>
    <div class="box1">
        <div class="box2"></div>
    </div>
    <div class="box1"></div>
    <div class="box2"></div>
    <div class="box3">
        <div class="box4"></div>
    </div>-->
    
</body>
</html>